Paper-cutting machine spacing mechanism



Dec. 14, 1943. M. SENDOR PAPER CUTTING MACHINE SPACING MECHANISM Filed Dec. 11, 1941 2 Sheets-Sheet 1 INVENTOR.

BY Nerf/mar 55/70 01" Dec. 14, 1943. M. SENDOR I PAPER CUTTING MACHINE SPACING MECHANISM Filed Dec. 11, 1941 2 Sheets-Sheet 2 I I N V EN TOR. Nor/7mm" fender BY w.

Patented Dec. 14, 1943 Nl'llED nane Ii kATEN-T OFFICE PAPER CUTTING MACHENE 'SPACIING MECHANISM 9 Claims.

This invention relates to improvements in preferably power driven paper cutters and particularly with spacin mechanism capable'of arrangement to define or determine the cutting positions for a given series of cuts and for repetition of the same serie of cuts.

One of the objects of the invention is the provision of simple, inexpensive, sturdy andaccurate mechanism attachable with a number of types of old and new style cutters and having means for cooperative or independent non-interfering operation relative to the machine mechanism;

Another object of the invention-is the provision of mechanism of the kind state-d arrangeable for cuts quite close together and for trim cuts as well as main cuts.

Another object is the provision of means for manual actuation of the spacing mechanism to lockingly clear the stops when a cut is made to permit the operator to Operate the back gauge feed to the next desired position of out.

Still another object is the provision of stop adjusting means to compensate for wear of the contacting surfaces of the stops.

These and other objects will be readily understood from the following description and attached drawings in which Fig. l is a perspective vi w of my novel spacing mechanism mounted on a paper cutter table with parts broken away.

Fig. 2 is a cross section view of my bar and stops taken on line 22 of Fig. 3.

Fig. 3 is a fragmentary plan View of my device showing my bar and stops and gauge finger.

Fig. i is an elevation View partly in section, looking at the front of a paper cutter machine showing my device mounted on the table with parts of the machine broken away. 7

Fig. 5 is a side elevation View partly in section of my spacing mechanism control crank handle and its locks taken on line 5-5 of Fig. 4.

Fig. 6 is a side elevation view of an embodiment of my stops showing the adjustahly mounted contacts on the finger engaging side of the stops.

Fig. '7 is an elevation view of an embodiment of my stop bar showing means for slideably adjusting its position relative to the table and table mount elements.

Fig. 8 is a perspective View of one of my stops showing right hand type finger-engaging-lip element 2 l 2.

My invention is shown in Figs. 1 and 4 applied to a paper cutter of more or less conventional design comprising a work table H, having suitable base standards (not shown) a back gauge l3 and a knife bar l l. Conventional means 55, driven by a motor (not shown), for actuating said knife up and thence down in which latter stroke the knife is drawn simultaneously across the paper stock, are schematically shown in part and may comprise mechanism such as described in Patent Number 464,202, wherein a driven crank shaft having crank pins which are joined by connecting rods with the knife ends, cause the knife to descend, make its out, and ascend to its topmost position.

A pressure clamp (not shown) is usually provided on such machines to hold the paper P while it is being cut.

The back gauge l3, as in Fig. 1, travels forward feeding the paper to the knife or backwards without the paper in the usual manner, and has projection 55; extending downward through a slot IT in the table, which projection it is joined to a belt is that runs as shown, on forward l3, and rearward wheel (not shown) supported upon the underside of the table. Said projection has finger 29 engageable with stops 2E. The forward whee" I8 is mounted to turn with a hand wheel 22 by means of which the belt it is caused to travel for propelling the back gauge 13 forwardly toward wheel 19, and backwardly away from the wheel.

On preferably the left side of said finger I mount on thetable by suitable means 23, a turnable rod 24' which carries a number of removably mounted and spaced apart top and bottom posts or stops 2!. Said rod has longitudinal groovesv 2m to receive screw ends 25! therein to facilitate guide of the stops along the rod and removable locking engagement of the stops with the rod.

Fixed on one end of rod it is lever 25 having end 26E in pivotal connection with one end of rod 2?, the other end of the latter rod being in turn pivotally connected at 2m with lever 2t the latter being fixed on rod 29. Member 29 is mounted to turn in suitable means 39, Eda. in

turn remo-vably mounted on the table it by screws 35% (see Fig. l).

The forward end 2%! of rod 2% has fixed thereon, one end 3H of control hand crank 3i. The free end iii?! of member 3% is limited in its arcuate movement by stops $2 on forward member 36 as shown in Figs. 1 and l to limit the movements of stops 2i as will be seen. It is seen that clockwise movement of crank 3t moves rod 12% clockwise and that anti-clockwise movement of crank 3i moves rod 2 3 anticlockwise. Forward member SQ-may be provided with preferably 3 detents 353i, 302 and 383 to selectively receive the ball of hand crank automatic set-mechanism 33 shown in Figs. 4 and 5, so that rod 24 and its stops 2| may be held in a desired set position relative to finger 20. Member 33 may comprise a housing having a spring actuated ball 34 the compression of which spring is increased when the screw 3-3 is moved inwardly toward the ball 36. When the ball sets in detent 3M the bottom stops 2! are engageable with the finger. With the ball in detent 333 as in Figs. 1 and 4, the top stops 25 are engageable with the finger. The lever 3! may have mounted thereon a pin 3'! which may engage one of ports 384, 365, 3% in the same radial lin s respectively as indents Silt, 352, 383 of member 38 to more positively engage the lever 3! with member 38. The pin is more frequently used to engage the central port 305 to maintain the stops 2! in neutral unengageable position as in Fig. 2. At times only indents 3M, and port 3535 are provided. A handle 38 is mounted on free end of lever crank 3i.

the embodiment of Fig. 6 is shown a pair of stops Zia each having a screw 2H mounted thereon and held by set screw M2. The head of member 2 ii is arranged to contact the finger presenting adjustable contact means. The contacting surface of stops not having such screws Eli are known to wear. It is seen that the position of the head of screw Hi can be adjusted to compensate for wear by releasing the set screw 252 and turning the head screw.

In operation the spaces between the cut lines of the paper P are determined and the spacing S required between the stops conforming with the spacing between the cut lines is provided by setting the stops 2| on the bar 24, in accordance with the out line determination. The finger contacting surface 25! of the most forward stop is usually set to contact the finger 20 at the point where the knife M contacts the paper for the most forward cut, the paper being in clamped position on the table. Once the paper has been out along said line, by engagement of a main clutch to produce a revolution of the crank shaft causing the knife to descend, make the cut and ascend, the now unclamped remaining paper is moved forwards on the table by anticlockwise movement of wheel 22. Of course the gauge and paper move forward only after the stops 2| are placed in neutral position (see Fig. 2) permitting forward unobstructed movement of the finger 2o past the stops 2|.

Movement of crank 3i, engaging ball 36 in detent 332 places the stops in neutral position. As the second out line on the paper approaches the knife edge line the second most forward stop is swun into finger engaging position, its surface 2 ii to contact the finger surface 28! when the out line of the paper coincides with the knife edge line. Said second stop may be mounted on the upper part and groove of bar 24 or on the lower groove. Where paper trim cuts, close together and narrower than the width of a stop or stop lip 2 22, are necessary, I prefer to set the contacting surface of the lower stop a distance equal to the width of the trim, to the front of similar contacting surface of the upper stop. Various arranged position of stops are seen possible. At times stops arranged merely on the top rail are adequate to provide the spacing for the necessary series of cuts of paper. Stacks of sheets having gang printed labels thereon usually require that stops be placed on both top and bottom parts of the grooved bar to efiiciently cut the gang printed sheets into the many labels printed on each sheet.

Fig. 8 shows a perspective of a right hand type stop block having finger engaging lip 212 and contacting surface 2| Ia. It is understood that such a lip may be left hand type as shown in Fig. 3.

To provide unitary longitudinal adjustment of the rod with its mounted stops in Fig. '7 is seen an embodiment of a rod 24 having elongated rear and front ends 245, 2:36 for slideable engagement in front and rear members 23. End 2 15 is threaded for nut 247. Spring 2&8, flexing against shoulder 2M and member 25, normally maintains the rod forwardly. Turning the nut 24! clockwise moves rod 24 and its mounted stops rearwardly against the normal action of spring 2 .8.

Having thus described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, a finger movable with the work, a rectangular grooved rod journaled on said machine parallel with the line of work travel, stops fixedly carried by said grooved rod with respect to the Work travel and engageable with said finger, a shaft journaled on said machine and connected at one end to said groove-d rod by means of links to control the angular position of the grooved rod, means on the other end of the shaft to manually rock said shaft to engage a selected stop and finger to hold the work and to disengage same to advance the work.

2. The device of claim 1 includin latching means on said rock means engageable with the machine to lock the shaft in position to hold the stop in the desired position.

3. The device of claim 1 in which the stops are movably mounted on said rod to gauge different positions of the work for a series of operations thereon, said positions being variable from nil to maximum.

4. The device of claim 1 including means to adjust the finger engaging surface of said stops comprising a turnable screw mounted on said stops.

5. The device of claim 1 including means to adjust the finger engaging surface of said stops comprising a turnable screw mounted on said stops, and means to lock said screw in its adjusted position.

6. The device of claim 1 including means on said rod to move it independently in the direction of finger travel comprising ends on the rod slideable in said journals, a sprin having one end engaged with the rod and another end engaged with the machine flexibly tending to slide the rod in said journals against the action of a turnable nut on an end of the rod engaged with the machine.

7. The device of claim 1 in which said spacing mechanism is demountable and independent of the machine.

8. The device of claim 1 including means for fixing said stops on said rod comprising a screw in the stop engageable with said rods grooved portion whereby partial release of the screw permits slide of the stop on the rod and full release of the screw permits separation of the stop from the rod.

9. In a machine of the class described, a finger movable with the work, a rectangular fluted rod journaled on said machine parallel with the line of work travel, stops carried by said fluted rod with respect to the work travel and engageable with said finger, a shaft journaled on said machine and connected at one end to said fluted rod by means of links to control the angular position of the fluted rod, means on the other end of the shaft to manually rock said shaft to engage a selected stop and finger to hold the work and to disengage same to advance the work, and latching means on said rock means engageable with the machine to lock the shaft in position to hold the stop in the desired position.

MORTIMER SENDOR. 

